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基于CDS结构的动态安全组播密钥协商方案

, PP. 68-71

Keywords: 安全组播,密钥协商,CDS,椭圆曲线密码体制

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Abstract:

提出了一个应用椭圆曲线密码体制在基于CDS结构的动态安全组播中进行密钥协商的方案.首先采用CDS分组算法对组播组成员进行区域划分,然后应用椭圆曲线密码体制进行各个子组及整个大的组播组的密钥协商.采用CDS结构增加了灵活性,避免了单点故障的产生,提高了组播系统的健壮性.应用椭圆曲线密码体制,有效地减少了密钥程度和密码算法的计算量.具体分析了各个子组和整个大的组播组的密钥协商过程,以及在组成员动态变化时密钥的更新过程,结果表明,所提方案在降低计算和通信代价方面取得了较好的效果,而且满足组播密钥协商的各种安全要求.

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